I have had a cable modem break from me turning on extra logging and or statistics that apparently worked badly.  Turn off any extras you turned on.  Mine was also having random issues from a zwave transmitter tnat was really close.  The zwave caused errors on 2 of the many different frequencies on the cable that told me it was not a physical wiring issue but something else.  I found those stats in one of the cable modems pages.  Moving the device a few feet away resolved thay.

On Sun, Jul 9, 2023, 7:50 AM Michael D. Setzer II via users <users@lists.fedoraproject.org> wrote:
Island got hit with a Typhoon Cat 3/Cat 4 that caused lots of
damage to all internet providers. Power at house was out for a
week. They are still working on lots of issues.

Can figure when issue happens, and power cycle on cable modem
fixes it. Wonder if there might be some process to find way to
prevent it from happening or way to have script software reset
modem. Years ago had way to reboot Surfboard modem, but now
ISP using Arriss cable modems. Web access has no reboot option?
Thanks.


Usually would only need to reboot cable modem about once a
month, but over last 6 days, have required reboots average of 7.5
times a day? 45 total. Similar patterns for prior weeks.

Have script that does 50 pings to local name server, and most of
time is 0, with some values from 1% to 10%, but often jumps to
high rates over 80% to 100%. At which point the internet is
useless. All lights on modem are fine, TV, phone, and 4 Linux
machines all will report no internet. Traceroute to 8.8.8.8 still
works, but when no loss takes total of 1.3 seconds

While getting high loss using -n the time goes to 5.6 seconds, and
without -n takes 2 minutes 13 seconds?
Hops change of three test changes from 10, 14, and 13.

Summary of time.
Up Time         Hours           Days   
129:29:28               129.4911                5.40    90.76%
Down Time       Hours           Days   
13:15:54                13.2650         0.55    9.24%

Script plays sound when ping rate over 10%, and reset brings
everything back to normal. But for how long before it returns has
no pattern that I can find. On some cases if not around to power
cycle it, it will start working again, but rare. Usually, only power
cycle fixes it.

ARRIS DOCSIS 3.1 / PacketCable 1.5 Touchstone Telephony
Modem
HW_REV: 8
VENDOR: ARRIS Group, Inc.
BOOTR: 2.2.23.635901
SW_REV: 11.02.032.09.03.NCS
MODEL: TM3402A

Haven't found a way to send software reboot to modem, so only
physical power cycle works. Seems company was bought by
another and info from web site has been useless.

Looked at netstat and nstat info before and after outages, but don't
see anything from the linux side that shows what issue is.

Get the 50+M speedtest results when working.
Example of a cycle.
Time and percentage of ping loss
2023-07-09 06:27:00     88
2023-07-09 06:30:00     76
2023-07-09 06:33:00     84
2023-07-09 06:36:00     84
2023-07-09 06:39:00     82
2023-07-09 06:42:00     78
2023-07-09 06:44:00     78
2023-07-09 06:47:00     84
2023-07-09 06:50:00     90
2023-07-09 06:53:00     82
2023-07-09 06:56:00     82
2023-07-09 06:59:00     92
2023-07-09 07:01:00     72
2023-07-09 07:04:00     82
2023-07-09 07:07:00     82
2023-07-09 07:10:00     80
Power Cycle modem makes access to 192.168.100.1 fail till about
3 to 4  minute reboot time.
2023-07-09 07:12:00     100     Cable Modem not accessible
Reports when ping rate goes back to normal.
2023-07-09 07:16:00     0       UP


+------------------------------------------------------------+
 Michael D. Setzer II - Computer Science Instructor (Retired)     
 mailto:mikes@guam.net                           
 mailto:msetzerii@gmail.com
 Guam - Where America's Day Begins                       
 G4L Disk Imaging Project maintainer
 http://sourceforge.net/projects/g4l/
+------------------------------------------------------------+


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